Metallogenic Characteristic and Potential of Copper Polymetallic Deposits in Zhaohuduge Area of Chifeng City
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摘要: 研究区位于大兴安岭中南段铜多金属成矿集中带。其成矿与燕山中晚期潜火山岩侵入体有成因联系。成矿时代为273~120 Ma，以晚侏罗世-早白垩世为主，矿床成因类型多为热液浸染型。通过对成矿地质特征与成矿条件分析与研究，对区域矿产特征进行详细论述，且建立成矿模型。研究表明，研究区成矿具有时空性与深源性，具有较好的矿化蚀变；北东向破碎带提供了导矿构造且主构造次级构造裂隙、及多组构造裂隙交汇处为容矿构造；火山热液是使地壳中的成矿物质发生活化、运移、富集的成矿介质。研究结果认为区域内有较好的成矿潜力。Abstract: The study area is located within the copper polymetallic metallogenic belt in the middle and southern part of the Greater Xing'an Mountains. The mineralization in this area has a genetic relationship with the subvolcanic intrusion in middle and late Yanshanian, with a mineralization age of 273~120Ma, which are mainly from the Late Jurassic to the Early Cretaceous. And most of these deposits belong to hydrothermal disseminated type. Through analyzing and studying the mineralization geological characteristics and metallogenic conditions of these deposits, the geological characteristics of regional mineral resources have been discussed in detail, and their metallogenic model has been established in this paper. The results show that the mineralization in this area has space-time and deep-source natures, with good mineralization alteration. The NE-trending fractured zone provides the ore-transmitting structure, while the sub-structure fractures and the interchanges of multi-group structural fractures serve as the ore-hosting structures. Volcanic hydrothermal fluid is ore-forming medium for the activation, migration and enrichment of mineralization minerals in crust. The results also show that this area has a good potential for mineralization.
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